Starobinsky-like two-field inflation

Sho Kaneda, Sergei V. Ketov

Результат исследований: Материалы для журналаСтатья

26 Цитирования (Scopus)

Аннотация

We consider an extension of the Starobinsky model, whose parameters are functions of an extra scalar field. Our motivation is to test the robustness (or sensitivity) of the Starobinsky inflation against mixing scalaron with another (matter) scalar field. We find that the extended Starobinsky model is (classically) equivalent to the two-field inflation, with the scalar potential having a flat direction. For the sake of fully explicit calculations, we perform a numerical scan of the parameter space. Our findings support the viability of the Starobinsky-like two-field inflation for a certain range of its parameters, which is characterized by the scalar index ns=0.96±0.01, the tensor-to-scalar ratio r

Язык оригиналаАнглийский
Номер статьи26
Страницы (с-по)1-14
Число страниц14
ЖурналEuropean Physical Journal C
Том76
Номер выпуска1
DOI
СостояниеОпубликовано - 1 янв 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Engineering (miscellaneous)

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